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Gepubliceerd in: Tijdschrift voor Kindergeneeskunde 2/2001

01-04-2001 | Artikelen

Congenitale defecten van de glycosylering (cdg) anno 2000

Auteurs: Jaak Jaeken, Hubert Carchon

Gepubliceerd in: Tijdschrift voor Kindergeneeskunde | Uitgave 2/2001

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Samenvatting

Congenitale defecten van de glycosylering (cdg) vormen een familie van erfelijke defecten in het metabolisme van het koolhydraatgedeelte van glycoconjugaten. Men onderscheidt twee hoofdgroepen. cdg-i zijn defecten in de assemblage van N-glycanen in het cytosol en het endoplasmatisch reticulum. Ze omvatten cdg-ia (fosfomannomutase 2-deficiëntie), cdg-ib (fosfomannose-isomerasedeficiëntie), cdg-ic (α-1,3-glucosyltransferasedeficiëntie), cdg-id (α-1,3-mannosyltransferasedeficiëntie) en cdg-ie (dolichol-P-mannosesynthase 1-deficiëntie). cdg-ii zijn defecten van de bewerking van de N-glycanen in endoplasmatisch reticulum en Golgi-apparaat en van de synthese van de O-glycanen in het Golgi-apparaat. In deze groep zijn drie defecten bekend: cdg-iia (N-acetylglucosaminyltransferase ii-deficiëntie), cdg-iib (α-glucosidase i-deficiëntie) en een defect in de import van gdp-fucose in het Golgi-apparaat. cdg-ia is, met meer dan 300 patiënten bekend, veruit het meest voorkomende erfelijke glycosyleringsdefect; van de 7 andere defecten zijn van één tot een 20-tal patiënten gerapporteerd. Het klinische spectrum van deze ziekten is enorm breed. cdg-ia is een multisysteemziekte met een aanzienlijke neurologische component en vrij typische dysmorfie. Ook bij de andere cdg staat neurologisch lijden op de voorgrond, met uitzondering van cdg-ib, dat een hepatisch-intestinale ziekte is. De diagnose van deze laatse aandoening is bijzonder belangrijk omdat er een efficiënte behandeling bestaat in de vorm van mannosetoediening. De belangrijkste test voor het opsporen van deze ziekten is iso-elektrofocussering van serumtransferrine.
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Metagegevens
Titel
Congenitale defecten van de glycosylering (cdg) anno 2000
Auteurs
Jaak Jaeken
Hubert Carchon
Publicatiedatum
01-04-2001
Uitgeverij
Bohn Stafleu van Loghum
Gepubliceerd in
Tijdschrift voor Kindergeneeskunde / Uitgave 2/2001
Print ISSN: 0376-7442
Elektronisch ISSN: 1875-6840
DOI
https://doi.org/10.1007/BF03061351

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